Torsion spring to aid in keeping an interior door open



FIG. 1 is a perspective of a torsion spring to aid in keeping an interior door open showing the design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is another side elevational view thereof;

FIG. 4 is a bottom elevational view thereof; and

FIG. 5 is a top elevational view thereof;

FIG. 6 is an end elevational view thereof; and,

FIG. 7 is another end elevational view thereof. 

CLAIM The ornamental design for a torsion spring to aid in keeping an interior door open, as shown and described. 